Gas pressure regulator and method for piloting said pressure regulator
First Claim
1. A method for piloting a pressure regulator for an operative gas, said pressure regulator comprising:
- a flow duct for said operative gas;
a shutter arranged along said flow duct in such a way as to define a narrowing in said flow duct, said narrowing being suited to cause a pressure drop in said operative gas from a feeding pressure, present in an upstream area of said flow duct upstream of said shutter with respect to the flow direction of said operative gas, to a delivery pressure, present in a downstream area of said flow duct downstream of said shutter, said shutter being movable in such a way as to modify the cross section of said narrowing;
a motorisation chamber placed in communication with said downstream area, at least partially delimited by a first movable wall, said first movable wall being connected to said shutter so that the increase in said delivery pressure causes a corresponding movement of said shutter that is suited to reduce said cross section of said narrowing, and vice versa;
elastic means for counteracting the pressure force exerted by said operative gas on said first movable wall by exerting on said first movable wall a predefined force tending to move said shutter so as to increase said cross section of said narrowing;
a compensation chamber distinct from said motorisation chamber, filled with a compensation gas and at least partially delimited by a second movable wall connected to said shutter in such a way as to be able to transfer a pressure force of said compensation gas to said shutter,the method including the operation of regulating, moment by moment, the pressure of said compensation gas according to said delivery pressure.
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Accused Products
Abstract
A method for piloting a pressure regulator for an operative gas, the pressure regulator having a flow duct for the operative gas; a shutter causing a pressure drop in the operative gas, from a feeding pressure to a delivery pressure; a motorisation chamber delimited by a first movable wall associated with the shutter so that an increase in the delivery pressure causes a narrowing of the shutter; an elastic element exerting on a first movable wall a force directed to counteract the pressure force exerted by the operative gas on the first movable wall and widening the shutter; a compensation chamber housing a compensation gas and at least partially delimited by a second movable wall connected to the shutter to enable transferring on it the pressure force of the compensation gas, the method including the operation of regulating, moment by moment, the pressure of the compensation gas as a function of the delivery pressure.
22 Citations
11 Claims
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1. A method for piloting a pressure regulator for an operative gas, said pressure regulator comprising:
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a flow duct for said operative gas; a shutter arranged along said flow duct in such a way as to define a narrowing in said flow duct, said narrowing being suited to cause a pressure drop in said operative gas from a feeding pressure, present in an upstream area of said flow duct upstream of said shutter with respect to the flow direction of said operative gas, to a delivery pressure, present in a downstream area of said flow duct downstream of said shutter, said shutter being movable in such a way as to modify the cross section of said narrowing; a motorisation chamber placed in communication with said downstream area, at least partially delimited by a first movable wall, said first movable wall being connected to said shutter so that the increase in said delivery pressure causes a corresponding movement of said shutter that is suited to reduce said cross section of said narrowing, and vice versa; elastic means for counteracting the pressure force exerted by said operative gas on said first movable wall by exerting on said first movable wall a predefined force tending to move said shutter so as to increase said cross section of said narrowing; a compensation chamber distinct from said motorisation chamber, filled with a compensation gas and at least partially delimited by a second movable wall connected to said shutter in such a way as to be able to transfer a pressure force of said compensation gas to said shutter, the method including the operation of regulating, moment by moment, the pressure of said compensation gas according to said delivery pressure. - View Dependent Claims (2, 3)
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4. A system for regulating the pressure of an operative gas, wherein the system comprises:
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a casing defines a flow duct for said operative gas; a shutter arranged along said flow duct in such a way as to define a narrowing in said flow duct, said narrowing being suited to cause a pressure drop in said operative gas from a feeding pressure, present in an upstream area of said flow duct upstream of said shutter with respect to the flow direction of said operative gas, to a delivery pressure, present in a downstream area of said flow duct downstream of said shutter, said shutter being movable in such a way as to modify the cross section of said narrowing; a motorisation chamber provided with an opening suited to connect it to said downstream area, at least partially delimited by a first movable wall, said first movable wall being connected to said shutter so that the increase in said delivery pressure causes a corresponding movement of said shutter suited to reduce said cross section, and vice versa; elastic means configured in such a way as to exert on said first movable wall a predefined force, said predefined force being directed so that it counteracts the pressure force exerted by said operative gas on said first movable wall and tending to move said shutter so as to increase said cross section of said narrowing; a compensation chamber distinct from said motorisation chamber and at least partially delimited by a second movable wall operatively connected to said shutter in such a way as to be able to transfer the pressure force of a gas contained in said compensation chamber to said shutter, wherein said casing defines a compensation channel that communicates at a first end with said compensation chamber and at a second end with the outside of said casing; a throttling valve provided with an inlet mouth communicating with said upstream area and with an outlet mouth communicating with said second end of said compensation channel; and a pilot valve suited to be controlled in such a way as to vary the extent of its opening in proportion to the difference between a predefined pilot pressure and said delivery pressure, said pilot valve being provided with a pilot valve inlet mouth communicating with said outlet mouth of said throttling valve and with a pilot valve outlet mouth communicating with said downstream area. - View Dependent Claims (5, 6, 7, 8, 9, 10, 11)
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Specification